Molder&#39;s flask.



B. T. MoHUGH.

MOLDER'S FLASK. APPLICATION FILED NOV. 2a, 1909.

928,000. Patented July 13, 1909.

2 SHEETS-SHEET 1.

IN VEN TOR.

ATTORNEY.

E. T. MOHUGH. MOLDEBVS FLASK. APPLICATION FILED 21037.28, 1908.

Patented July 13,1909.

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EDWARD T. MGHUGH, OF HOLYOKE, MASSACHUSETTS.

MOLDERS FLASK.

Specification of Letters Patent.

Application filed November 28, 1908.

To all whom it may concern:

Be it known that I, EDWARD T. Mel-loan, a citizen of the United Statesof America, and resident of Holyoke, in the county of Hampden and Stateof Massachusetts, have invented certain new and useful Improvements inMolders Flasks, of which the following is a full, clear, and exactdescription.

This invention relates to improvements in corner fastenings or looks formolders snap-flasks, in which the two right-angular separable parts ofboth the cope andnowel divisions of the flask are held together atdiagonally opposite corners by locking snapcatches; and the object ofthis invention is to provide interengaging corner constructionscomprising distending springs and snap-catches which latter may beeasily brought to locked relations-for holding the separable orexpanding parts of the flask while in their contracted relationssecurely against premature release or accidental unlocking, and whereby,as required, the catches may be quickly and conveniently released so Fthat the right angular half frame portions .of each flask may beautomatically distended or opened.

The invention consists in the combination or arrangements of parts andthe constructions of certain of the parts all substantially ashereinafter described in conjunction with the accompanying drawings andset forth in the claims.

In the drawings :-Figure 1 is a plan view of a snap flask, the twoseparable parts thereof being shown as unlocked, and in their expandedand distended relations; Fig. 2 is a plan or face view of the flask, thetwo side frames of which are shown as locked; the position in which theflask as a whole is shown being a usual one in operating the same. Fig.3 is an elevation showing the adjacent corner portions of the twoseparable parts of both the cope and nowel divisions of a flask, asunlocked and separated, one of the locking devices being shown insection, as taken on the line 33, Fig. 1. Fig. at is a similar view toFig. 3 in every respect except that the two parts of both divisions ofthe flask are shown in their closed relations and locked. Fig. 5 is anend elevation of the'locking devices at one corner of both divisions ofa flask, the view being taken in the direction indicated by the arrow Bin Fig. 2, the snap-catches being shown in their unlocked position, withsome parts in verti- Patented July 13, 1909 Serial No. 1643M.

cal section as taken on line 5 5, Fig. 8. Fig. 6 is a similar view toFig. 5, but showing the snap catches in their locked positions. Fig. 7is a perspective view of several of the coacting parts of the snap-catchin separated relations.

In the drawings, A represents the cope and A the nowelor drag of aflask, and as is common in snap-flasks, each division consists, insteadof one complete four-sided frame, of two halfframes a and 6 each ofwhich comprises a side wall and an end wall, and which, when united intheir proper relations to each other by the corner looks or snapcatchesB, usually surround a light (four sided) frame C which is separately supported within the said frames a and Z), by the short dowel pins 0. Theframes C are strengthened and supported by the inclosing snap-flaskframes a and 6 during the operation of ramming the sand about theproperly introduced patterns, the rapping of the latter and the otherwell known operations common to molders trade, all requiring a strongand rigid flask; but on the completion of the mold within the insideframes C, the heavy flask-frames a and b are not necessary for thesuccessive operations of making the casting (especially light castings)and are, therefore, removed, and are repeatedly used with other insideframes G.

The snap-catch or lock,duplicated for the corners of the sectionalfiask,which constitutes the present invention will now be described indetail. The adjacent separable corner portions of the flask-frames a andb of both the cope and nowel divisions ofthe flask, are provided withthe lock supporting plates 10 and 12 respectively which are securelyfitted and attached thereto, as shown in dotted line in Figs. 1 and 2,and which have angularly projecting end flanges 1a and 15 respectivelywhich extend outwardly from the plate-portions 10 and 12 at an angle ofabout 15 degrees. The flanges 14 and 15 of lock-plates 10 and 12 have,formed centrally thereon, cylindrical bosses l6 and 17 respectivelywhich are axially in line with each other. The bosses 17 on the flanges15 of lock plates 12 rigidly support in threaded engagement therewithone end of the guide bolts or bars 18, which extend therefrom to andloosely through a central bore in the bosses 1a of lock plates 10, andserve to steady and guide the approached ends of the flask frames a andb and to maineither side of the guide bolts 18.

tain them in relations to each other which constitute in practice afour-sided flaskframe, the diagonally opposite corners of which areslightly separable.

The degree of separation which the lock provided corners of the frameparts a and I) have relative to each other is regulated by the stopbolts 19 which are two in number for each corner device, and are locatedon 7 One end of each stop bolt 19 is secured by a screwthreadedengagement with the flange 14 of lock-plate 10 and each bolt projectstherefrom to and loosely through the flange 15 of the adjacentlock-plate 12, and both bolts are provided on their end portions whichextend through the flanges 15, with nuts 20 which, as clearly shown inFigs. 3 and 4, prevent the withdrawal of the stop-bolts 19, through theflange portions 15.

The separable parts of the flask frame a and Z) are normally held apartfrom each other by the spiral spring 21 which is carried on the bolt 18and the end portions of which are supported within sockets in theadjacent faces of the flanges 14 and 15.

The means provided for holding the frame parts a and Z) in close andconstricting engagement about the inside mold-contammg frame C consistsin a latch, about to be described, which engages the guide-bolt 18.

The cylindrical axially bored boss 16, as will be best seen by areference to Figs. 3 and 5 of the drawing has formed on one side thereofa transversely extending slot 22, within which slides the verticalbolt-engaging detent or catch member 25 of the latch D carried as aright angled extension of an approximately semi-circular plate 26.

The guide bolt 18, see Figs. 3 and 1, has a notch 27 formed at a pointthereon so located that to bring it into a position in which the latch25 may engage it the two parts a and Z) of the flask are approachedsubstantially to their fullest extent against the compression of thespiral spring 21.

To automatically bring the latch 25 into locking engagement with notch27 of the guide-bolt 18 and to securely hold it against accidentaldisengagement therewith, during the somewhat violent handling to whichthe flask may be subjected while in its locked position, a spiral spring30 is provided on the opposite side of this boss 16 from the latchdetent 25 and in line therewith. The end of the spring 30 which rests onboss 16 is engaged by the teat or projection 31. The recoil of thespring 30 against the latch 25 whereby the said latch is caused to beclosely pressed against the bolt 18 is through the stirrup shaped frameE which comprises a cylindrical spring socket 36 from which twooppositely located and parallel legs 37 extend on either side of theboss 16 to and through the semi-circular member or latch plate 26 of thelatch D, their screw threaded ends being provided with the nuts 39 whichsecure the latch plate as one to the stirrup. The legs 37 of the stirrupE are guided relatively to the boss 16 in vertical side grooves 410 inthe boss 16, see Fig. 7.

The location of the above described latches D and stirrups E relativelyto the bosses 16 of the frame locks of the cope part of the flask areopposite to those of the nowel part, thereby bringing the latches D ofthe two divisions of the flask within easy reach of each other, so thatwhen the flask is, for instance, brought to the carrier supportedposition shown in Fig. 2, a forcing of all the latch members 26 towardeach other, manually, serves to automatically release the corner catchesof the divisions of the flask and permits them to be automaticallyexpanded and entirely free for removal from the mold frames C to be thenused for the making of further molds.

I claim 1. A flask section comprising separable L- shaped half framesprovided at their contiguous ends, at the diagonally opposite corners ofthe flask section with separated obliquely outwardly extendingprojections, one of each pair being provided with an aperture and theother with an aflixed bolt extending through the aperture and having acatch shoulder, the bolt carrying projection having guide holes at bothsides of the bolt and the other projection having aflixed parallel barsplaying through said holes, and provided with stop nuts at their freeends, a spring in compression between the pair of projections, and aspring latch supported by, and movably guided relatively to, theapertured projection and adapted to normally engage in the catchshoulder of the bolt when the flask portions are moved to contractedrelations.

2. A flask section comprising right angularly disposed separable sidewalls provided at their contiguous ends with separated obliquelyoutwardly extending projections one thereof being provided with anangular outwardly extending boss, and apertured through said bossprovided portion, said boss having a slot extending from its exterior tocommunication with said aperture and having opposite side guidingrecesses, the other projection being provided with a bolt extendingthrough said apertured boss and having a catch shoulder, a spring havinga separating react-ion between said projections, a stirrup shaped framestraddling about the said boss and guided in the opposite side recessesthereof and carrying, by and between the extremities of its legs a platehaving an angularly extended latch member disposed in the slot of theboss, and a spring in compression between the boss and the head of thestirrup frame for forcing the latter to move the latch carried therebyinto engagement With the catch shoulder of the bolt.

3. A flask section comprising right angularly disposed separable sideWalls provided at their contiguous ends With separated obliquelyoutwardly extending projections, one thereof being provided With anangular outwardly extending boss and apertured through said bossprovided portion, and the other project-ion being provided with a boltextending through sald aperture and having a catch shoulder, a springhaving a separating reaction between said projections, a stirrup shapedframe having a straddling and guided relation to said boss and carryingby and between the extremities of its legs a latch, and a springoperative between the boss and stirrup frame for forcing it to bring thelatch into engagement With the catch shoulder of the bolt.

4. A flask section comprising right angularly disposed separable sideWalls provided at their contiguous ends With separated obliquelyoutwardly extending projections, one thereof being provided With anangular outwardly extending boss, and having an aperture through saidboss provided portion, and the other projection being provided With abolt playing through said aperture and having a catch shoulder, a springhaving a separating reaction between said projections, and a latchmovably mounted on the said boss and spring pressed for an engagement inthe catch shoulder of the bolt.

Signed by me at Springfield, Mass, in presence of tWo subscribingWitnesses.

EDWARD T. MOI'IUGH.

\Vitnesses WVM. S. BELLOWS, Gr. R. DRISCOLL.

